[Overview]
<p>In the massive metagame shifting that came with the changes in the fourth generation, it is nice to see that Jolteon has kept its role and tier placement from ADV. Jolteon's improved Volt Absorb, which now restores its HP by 25% of its max HP if hit with an Electric-type attack, actually grants the rather frail Pokémon more switches in than what appears possible with its mediocre defenses. Jolteon can now switch into Pokémon like Starmie and Magnezone with little risk and set up a Substitute to pass to any teammate it wants.</p>
<p>Jolteon's shallow movepool and mediocre defenses hurt it. Choice Band Scizor can still do massive damage to it with Bullet Punch even though Jolteon resists it. Blissey walls all the attacks sets and Tyranitar can come in on most of Jolteon's attacks and threaten it with Earthquake. Jolteon needs Choice Specs to damage teams so therefore it lacks offensive versatility.</p>
[SET]
name: SpecsJolt
move 1: Thunderbolt
move 2: Hidden Power Grass / Hidden Power Ice
move 3: Shadow Ball
move 4: Baton Pass
item: Choice Specs
nature: Timid
evs: 4 Def / 252 SpA / 252 Spe
[SET COMMENTS]
<p>Choice Specs Jolteon may lack the flexibility to switch attacks, which the other sets have, but it makes up for that with its incredible power.</p>
<p>After the Choice Specs boost, Jolteon's Special Attack stat climbs to a whopping 478. Thunderbolt deals massive damage to anything that does not resist it and comes close to 2HKOing 4 HP / 0 SpD Tyranitar after Stealth Rock damage and can 3HKO 160 HP / 0 SpD Tyranitar, meaning Tyranitar can only switch in once. Since Salamence, the most common Dragon-type, takes neutral damage from Thunderbolt, Hidden Power Grass is used to hit Swampert and Mamoswine, which would otherwise wall this set. However, Hidden Power Ice allows Jolteon to OHKO opposing Dragonite, Salamence, and Gliscor, and provides perfect neutral coverage in OU outside of Magnezone. Shadow Ball is Jolteon's best option against the Rotom formes, and it hits Celebi hard, although it doesn't have the power to OHKO. It is also Jolteon's strongest attack against Gliscor if Jolteon opts to use Hidden Power Grass. Baton Pass may seem out of place on this set, but by "dry passing", Jolteon is capable of scouting many of its potential counters, allowing the trainer to switch in another Pokémon accordingly and predict properly the next time Jolteon is sent out.</p>
[ADDITIONAL COMMENTS]
<p>Since Jolteon's game plan generally involves spamming its powerful Thunderbolt, it is important to remove Pokemon that interfere with this such as Porygon2, Blissey, and Ground-types. Tyranitar can use its powerful Pursuit to dispose of Porygon2 and Blissey, or can use a mixed set to lure and remove Ground-types. Jolteon likes having Stealth Rock on the field therefore Swampert is a great choice to set Stealth Rock up because it can also counter other threats to Jolteon like Tyranitar, Gliscor, Flygon, and Hidden Power Grass-less Electivire. Jolteon is often Pursuited by Tyranitar so Lucario can be a prime partner to set up a Sword Dance while Tyranitar is locked onto Pursuit. It can also scare off Blissey, Porygon2, and Snorlax with a STAB Close Combat. Stealth Rock support from the likes of the Azelf, Infernape, or the previously mentioned Swampert is useful to hurt switch-ins.</p>
[SET]
name: SubPasser
move 1: Substitute
move 2: Baton Pass
move 3: Thunderbolt / Charge Beam
move 4: Hidden Power Ice
item: Leftovers
nature: Timid
evs: 4 HP / 252 SpA / 252 Spe
[SET COMMENTS]
<p>It won't come as a total shock to learn that the Electric-type Eeveelution we love hasn't changed too much from Advance to DP. The idea here is to employ one of the fastest Substitute / Baton Pass combinations in the game while "falling back on" a respectable 319 Special Attack stat. This provides for not only the third most powerful Thunderbolt in OU, but also a reasonably powerful Hidden Power Ice that will cover Jolteon's inherent weakness to Ground-type Pokémon. Hidden Power Ice is recommended because Salamence poses such an enormous threat, and it also allows a OHKO on Gliscor and reasonable damage to Celebi and Breloom. Hidden Power Ice also completes the great "BoltBeam" coverage.</p>
<p>Jolteon can reminisce about its GSC days and Growth with the addition of Charge Beam to its movepool. This will allow Jolteon to boost its own Special Attack stat and quickly pass boosts to the sweeper of your choice when Jolteon is threatened. Sadly, the fact that the chance to raise Special Attack is only 63%, factoring in accuracy, paired with the huge difference in power compared to Thunderbolt, makes Charge Beam an inferior option.</p>
[ADDITIONAL COMMENTS]
<p>A more defensive spread of 252 HP / 24 SpD / 232 Spe with a Timid nature can be used with Wish in the fourth slot over Hidden Power. This allows Jolteon's Substitutes to survive all Ice Beam from Blissey and Grass Knot from Celebi, making it easier to pass Substitutes to the rest of the team. It can also be used to pass Wish to its teammates, or even stall out a Toxiced opponent in a pinch.</p>
<p>Jolteon is often targeted by Ground-type attacks when its going to Baton Pass so it is wise to pass to Pokemon that are immune to Ground-attacks and that can then set up like Dragon Dance Gyarados and Dragon Dance Salamence. Other Pokemon such as Heatran and Swords Dance Lucario may have a Ground-type weakness, but once behind a Substitute, they are deadly and therefore can make nice partners. Lucario also scares off Blissey, Porygon2, and Snorlax. Latias and Celebi also can switch into Ground-type attacks with ease and set up Calm Mind or destroy the Ground-type that tried to counter Jolteon like Swampert. Swampert makes a nice partner for dealing with Tyranitar, Flygon and Gliscor should you lack Hidden Power Ice for the last two.</p>
[SET]
name: Charge Beam Sweeper
move 1: Charge Beam
move 2: Thunderbolt
move 3: Hidden Power Grass / Hidden Power Fighting
move 4: Shadow Ball
item: Life Orb
nature: Timid
evs: 4 Def / 252 SpA / 252 Spe
[SET COMMENTS]
<p>This set lacks the immediate power granted by Choice Specs, but Charge Beam's boosts and the ability to switch attacks make it much stronger in the long run. Charge Beam is the only way Jolteon can raise its Special Attack. This allows Jolteon to become a deadly sweeper in its own right. Charge Beam is best used as a finisher or when you expect a switch. A 63% chance of a raise in Special Attack, accounting accuracy, is decent, and should Jolteon grab a boost, its attacks will hit even harder than the SpecsJolt set. Thunderbolt is your strongest Electric-type attack and is an obvious move since Charge Beam is only for grabbing a boost, not sweeping. Shadow Ball deals with Ghost- and Psychic-types such as Celebi and Rotom-A who can otherwise be a nuisance. It also provides solid coverage with Electric-type STAB. Hidden Power Grass is used to hit Swampert, Mamoswine, and Rhyperior. However, Hidden Power Fighting is an option, as it is capable of OHKOing most variants of Tyranitar after a Charge Beam boost. Hidden Power Ice isn't useful for much outside of Gliscor, as Flygon usually runs Choice Scarf, and Salamence and Dragonite are both OHKOed by a +1 Thunderbolt.</p>
[ADDITIONAL COMMENTS]
<p>Gliscor, Tyranitar, and Swampert can easily wall this set so a Starmie with Grass Knot and Hydro Pump can effectively KO all these Pokemon. Swampert makes a solid partner to deal with Tyranitar as well as Flygon and Gliscor should Jolteon lack Hidden Power Ice, and should Electivire lack Hidden Power Grass, then Swampert can deal with it as well. It can also set up Stealth Rock to rack up damage with switches. Pokemon such as Gyarados and Salamence are nice offensive partners thanks to their Ground-type immunity, and Gyarados can lure in Electric-type attacks for Jolteon to recover health from. They can both do well at disposing of some of the more specially defensive Pokemon whom Jolteon hates. Lucario also makes a good offensive partner to scare off Blissey, Porygon2, Snorlax, and Tyranitar. Toxic Spikes support from Roserade may be useful to have an easier time against Celebi and Tyranitar, and also should you lack Hidden Power Grass, it will help against Swampert.</p>
[Team Options]
<p>Stealth Rock support is incredibly useful for the offensive sets to gain important KOs on Salamence and Togekiss with Choice Specs Thunderbolt, for example. Swampert is perhaps the best option to set this up as it is very reliable due to its bulk and can also counter Flygon, Gliscor, and Tyranitar. Azelf, Infernape, and Smeargle are other good options for setting up Stealth Rock should you want a quick set up. Spikes support isn’t necessary, but it can help in hurting switch-ins and helping take on Tyranitar. Forretress is very reliable at setting them up, but its slow pace may not be so beneficial to Jolteon. Therefore, Pokemon who can quickly set up Spikes, such as Froslass, Roserade, and Smeargle are good options. Toxic Spikes can help weaken Pokemon such as Celebi and Tyranitar and rack up damage, but they are not necessary. The previously mentioned Forretress can set them up, as can faster Pokemon such as Roserade and Smeargle.</p>
<p>For offensive partners, Gyarados and Salamence are among the best; they are immune to Ground-type moves, which Jolteon hates and can set up Dragon Dances with Substitute support from Jolteon. Gyarados also lures in Electric-type moves for Jolteon to absorb. Latias is another nice partner for taking Ground-type moves and works especially well as a partner to the Choice Specs set should you equip Latias with a Choice Scarf as it can check Pokemon that set up on a choice locked Jolteon. Tyranitar is a nice offensive partner as its powerful physical attacks can scare off many of the more specially orientated Pokemon, such as Blissey, which Jolteon hates. Lucario also works well as a partner, setting up on a choice locked Pursuit from Tyranitar and scaring off Blissey, Porygon2, Snorlax.</p>
<p>As for defensive partners, Swampert is probably the best. It can deal with Tyranitar, who is a big threat to Jolteon, and can take physical hits well, which Jolteon hates. Bulky Water-types such as Suicune and Vaporeon are good defensive partners to deal with Flygon and Gliscor, whom Jolteon without Hidden Power Ice hate. Gyarados can also make a nice defensive partner as it can take Ground-type moves aimed at Jolteon and Roar out Pokemon trying to set up On Jolteon. Celebi makes a solid defensive partner; it scares off Swampert and can easily take Ground-type moves aimed at Jolteon.</p>
[Optional Changes]
<p>Roar allows Jolteon to deal with Pokémon like Raikou and Ninjask. Thunder Wave is annoying as always, and Jolteon, unlike Blissey, can actually get away with using it on the wrong Pokémon because of its Speed and Baton Pass. Agility can work well with Baton Pass, but this strategy is better utilized by Zapdos, who is statistically better suited for that type of set (the only advantage that Jolteon has over Zapdos is its higher Speed, which is negligible after an Agility boost anyway). Signal Beam has rather limited use, but it does OHKO Celebi when boosted by Choice Specs. Yawn can be used to force switches, allowing Jolteon to set up a Substitute to Baton Pass away. Fake Tears is another option for forcing switches, and it can work well with Spikes / Toxic Spikes support. Jolteon can use Rain Dance should you be using a Rain Dance team as it provides a useful Electric-type immunity. Jolteon can also take advantage of Thunder in rain as it gains 100% accuracy. Life Orb can be used on the Charge Beam set and the Choice Specs set if you want more power in the Charge Beam set or it allows you to switch moves for the Choice Specs set.</p>
[Counters]
<p>As with Espeon, there are not many things that technically "counter" the true goals of a fast SubPasser, but there are indeed Pokémon who can both switch in to Jolteon with little to no risk and pose an immediate threat to it.</p>
<p>At the top of this list would be Electivire and its Motor Drive, which can use Jolteon's Thunderbolt against it to outspeed the charged cat and threaten an Earthquake that will OHKO. Tyranitar will shrug off Thunderbolt thanks to the Special Defense boost granted to it via Sand Stream and will indirectly counter repeated attempts to pass Substitutes thanks to that same ability. Most Jolteon do not carry Shadow Ball or Signal Beam, so Celebi is often a good switch-in since it will never take more than 40% damage from Hidden Power Ice even with no EVs in Special Defense. Porygon2 can switch into Thunderbolt by Tracing Jolteon's Volt Absorb and can proceed to wear away at it with Ice Beam while Recovering off any damage dealt to it by Hidden Power. Gardevoir too can Trace to take the Thunderbolt, and relative Hidden Powers won't do loads. Choice Specs Shadow Balls are worrying, but otherwise, Gardevoir can Calm Mind up against it.</p>
<p>Jolteon counters itself, obviously—pretty much every Electric Pokémon can switch into Jolteon without too much of a threat. Pokémon like Cresselia, Blissey, Snorlax, and Regice can switch in rather effortlessly, but I cannot stress enough that there is technically no counter to a fast SubPasser, especially one that can easily OHKO common phazers such as Skarmory, Swampert, and Suicune. Ground-types can counter Jolteon depending on the Hidden Power choice. If Jolteon lacks Hidden Power Ice; Flygon and Gliscor can counter it, while if Jolteon lacks Hidden Power Grass; Mamoswine, Swampert, and Rhyperior can deal with it.</p>
<p>In the massive metagame shifting that came with the changes in the fourth generation, it is nice to see that Jolteon has kept its role and tier placement from ADV. Jolteon's improved Volt Absorb, which now restores its HP by 25% of its max HP if hit with an Electric-type attack, actually grants the rather frail Pokémon more switches in than what appears possible with its mediocre defenses. Jolteon can now switch into Pokémon like Starmie and Magnezone with little risk and set up a Substitute to pass to any teammate it wants.</p>
<p>Jolteon's shallow movepool and mediocre defenses hurt it. Choice Band Scizor can still do massive damage to it with Bullet Punch even though Jolteon resists it. Blissey walls all the attacks sets and Tyranitar can come in on most of Jolteon's attacks and threaten it with Earthquake. Jolteon needs Choice Specs to damage teams so therefore it lacks offensive versatility.</p>
[SET]
name: SpecsJolt
move 1: Thunderbolt
move 2: Hidden Power Grass / Hidden Power Ice
move 3: Shadow Ball
move 4: Baton Pass
item: Choice Specs
nature: Timid
evs: 4 Def / 252 SpA / 252 Spe
[SET COMMENTS]
<p>Choice Specs Jolteon may lack the flexibility to switch attacks, which the other sets have, but it makes up for that with its incredible power.</p>
<p>After the Choice Specs boost, Jolteon's Special Attack stat climbs to a whopping 478. Thunderbolt deals massive damage to anything that does not resist it and comes close to 2HKOing 4 HP / 0 SpD Tyranitar after Stealth Rock damage and can 3HKO 160 HP / 0 SpD Tyranitar, meaning Tyranitar can only switch in once. Since Salamence, the most common Dragon-type, takes neutral damage from Thunderbolt, Hidden Power Grass is used to hit Swampert and Mamoswine, which would otherwise wall this set. However, Hidden Power Ice allows Jolteon to OHKO opposing Dragonite, Salamence, and Gliscor, and provides perfect neutral coverage in OU outside of Magnezone. Shadow Ball is Jolteon's best option against the Rotom formes, and it hits Celebi hard, although it doesn't have the power to OHKO. It is also Jolteon's strongest attack against Gliscor if Jolteon opts to use Hidden Power Grass. Baton Pass may seem out of place on this set, but by "dry passing", Jolteon is capable of scouting many of its potential counters, allowing the trainer to switch in another Pokémon accordingly and predict properly the next time Jolteon is sent out.</p>
[ADDITIONAL COMMENTS]
<p>Since Jolteon's game plan generally involves spamming its powerful Thunderbolt, it is important to remove Pokemon that interfere with this such as Porygon2, Blissey, and Ground-types. Tyranitar can use its powerful Pursuit to dispose of Porygon2 and Blissey, or can use a mixed set to lure and remove Ground-types. Jolteon likes having Stealth Rock on the field therefore Swampert is a great choice to set Stealth Rock up because it can also counter other threats to Jolteon like Tyranitar, Gliscor, Flygon, and Hidden Power Grass-less Electivire. Jolteon is often Pursuited by Tyranitar so Lucario can be a prime partner to set up a Sword Dance while Tyranitar is locked onto Pursuit. It can also scare off Blissey, Porygon2, and Snorlax with a STAB Close Combat. Stealth Rock support from the likes of the Azelf, Infernape, or the previously mentioned Swampert is useful to hurt switch-ins.</p>
[SET]
name: SubPasser
move 1: Substitute
move 2: Baton Pass
move 3: Thunderbolt / Charge Beam
move 4: Hidden Power Ice
item: Leftovers
nature: Timid
evs: 4 HP / 252 SpA / 252 Spe
[SET COMMENTS]
<p>It won't come as a total shock to learn that the Electric-type Eeveelution we love hasn't changed too much from Advance to DP. The idea here is to employ one of the fastest Substitute / Baton Pass combinations in the game while "falling back on" a respectable 319 Special Attack stat. This provides for not only the third most powerful Thunderbolt in OU, but also a reasonably powerful Hidden Power Ice that will cover Jolteon's inherent weakness to Ground-type Pokémon. Hidden Power Ice is recommended because Salamence poses such an enormous threat, and it also allows a OHKO on Gliscor and reasonable damage to Celebi and Breloom. Hidden Power Ice also completes the great "BoltBeam" coverage.</p>
<p>Jolteon can reminisce about its GSC days and Growth with the addition of Charge Beam to its movepool. This will allow Jolteon to boost its own Special Attack stat and quickly pass boosts to the sweeper of your choice when Jolteon is threatened. Sadly, the fact that the chance to raise Special Attack is only 63%, factoring in accuracy, paired with the huge difference in power compared to Thunderbolt, makes Charge Beam an inferior option.</p>
[ADDITIONAL COMMENTS]
<p>A more defensive spread of 252 HP / 24 SpD / 232 Spe with a Timid nature can be used with Wish in the fourth slot over Hidden Power. This allows Jolteon's Substitutes to survive all Ice Beam from Blissey and Grass Knot from Celebi, making it easier to pass Substitutes to the rest of the team. It can also be used to pass Wish to its teammates, or even stall out a Toxiced opponent in a pinch.</p>
<p>Jolteon is often targeted by Ground-type attacks when its going to Baton Pass so it is wise to pass to Pokemon that are immune to Ground-attacks and that can then set up like Dragon Dance Gyarados and Dragon Dance Salamence. Other Pokemon such as Heatran and Swords Dance Lucario may have a Ground-type weakness, but once behind a Substitute, they are deadly and therefore can make nice partners. Lucario also scares off Blissey, Porygon2, and Snorlax. Latias and Celebi also can switch into Ground-type attacks with ease and set up Calm Mind or destroy the Ground-type that tried to counter Jolteon like Swampert. Swampert makes a nice partner for dealing with Tyranitar, Flygon and Gliscor should you lack Hidden Power Ice for the last two.</p>
[SET]
name: Charge Beam Sweeper
move 1: Charge Beam
move 2: Thunderbolt
move 3: Hidden Power Grass / Hidden Power Fighting
move 4: Shadow Ball
item: Life Orb
nature: Timid
evs: 4 Def / 252 SpA / 252 Spe
[SET COMMENTS]
<p>This set lacks the immediate power granted by Choice Specs, but Charge Beam's boosts and the ability to switch attacks make it much stronger in the long run. Charge Beam is the only way Jolteon can raise its Special Attack. This allows Jolteon to become a deadly sweeper in its own right. Charge Beam is best used as a finisher or when you expect a switch. A 63% chance of a raise in Special Attack, accounting accuracy, is decent, and should Jolteon grab a boost, its attacks will hit even harder than the SpecsJolt set. Thunderbolt is your strongest Electric-type attack and is an obvious move since Charge Beam is only for grabbing a boost, not sweeping. Shadow Ball deals with Ghost- and Psychic-types such as Celebi and Rotom-A who can otherwise be a nuisance. It also provides solid coverage with Electric-type STAB. Hidden Power Grass is used to hit Swampert, Mamoswine, and Rhyperior. However, Hidden Power Fighting is an option, as it is capable of OHKOing most variants of Tyranitar after a Charge Beam boost. Hidden Power Ice isn't useful for much outside of Gliscor, as Flygon usually runs Choice Scarf, and Salamence and Dragonite are both OHKOed by a +1 Thunderbolt.</p>
[ADDITIONAL COMMENTS]
<p>Gliscor, Tyranitar, and Swampert can easily wall this set so a Starmie with Grass Knot and Hydro Pump can effectively KO all these Pokemon. Swampert makes a solid partner to deal with Tyranitar as well as Flygon and Gliscor should Jolteon lack Hidden Power Ice, and should Electivire lack Hidden Power Grass, then Swampert can deal with it as well. It can also set up Stealth Rock to rack up damage with switches. Pokemon such as Gyarados and Salamence are nice offensive partners thanks to their Ground-type immunity, and Gyarados can lure in Electric-type attacks for Jolteon to recover health from. They can both do well at disposing of some of the more specially defensive Pokemon whom Jolteon hates. Lucario also makes a good offensive partner to scare off Blissey, Porygon2, Snorlax, and Tyranitar. Toxic Spikes support from Roserade may be useful to have an easier time against Celebi and Tyranitar, and also should you lack Hidden Power Grass, it will help against Swampert.</p>
[Team Options]
<p>Stealth Rock support is incredibly useful for the offensive sets to gain important KOs on Salamence and Togekiss with Choice Specs Thunderbolt, for example. Swampert is perhaps the best option to set this up as it is very reliable due to its bulk and can also counter Flygon, Gliscor, and Tyranitar. Azelf, Infernape, and Smeargle are other good options for setting up Stealth Rock should you want a quick set up. Spikes support isn’t necessary, but it can help in hurting switch-ins and helping take on Tyranitar. Forretress is very reliable at setting them up, but its slow pace may not be so beneficial to Jolteon. Therefore, Pokemon who can quickly set up Spikes, such as Froslass, Roserade, and Smeargle are good options. Toxic Spikes can help weaken Pokemon such as Celebi and Tyranitar and rack up damage, but they are not necessary. The previously mentioned Forretress can set them up, as can faster Pokemon such as Roserade and Smeargle.</p>
<p>For offensive partners, Gyarados and Salamence are among the best; they are immune to Ground-type moves, which Jolteon hates and can set up Dragon Dances with Substitute support from Jolteon. Gyarados also lures in Electric-type moves for Jolteon to absorb. Latias is another nice partner for taking Ground-type moves and works especially well as a partner to the Choice Specs set should you equip Latias with a Choice Scarf as it can check Pokemon that set up on a choice locked Jolteon. Tyranitar is a nice offensive partner as its powerful physical attacks can scare off many of the more specially orientated Pokemon, such as Blissey, which Jolteon hates. Lucario also works well as a partner, setting up on a choice locked Pursuit from Tyranitar and scaring off Blissey, Porygon2, Snorlax.</p>
<p>As for defensive partners, Swampert is probably the best. It can deal with Tyranitar, who is a big threat to Jolteon, and can take physical hits well, which Jolteon hates. Bulky Water-types such as Suicune and Vaporeon are good defensive partners to deal with Flygon and Gliscor, whom Jolteon without Hidden Power Ice hate. Gyarados can also make a nice defensive partner as it can take Ground-type moves aimed at Jolteon and Roar out Pokemon trying to set up On Jolteon. Celebi makes a solid defensive partner; it scares off Swampert and can easily take Ground-type moves aimed at Jolteon.</p>
[Optional Changes]
<p>Roar allows Jolteon to deal with Pokémon like Raikou and Ninjask. Thunder Wave is annoying as always, and Jolteon, unlike Blissey, can actually get away with using it on the wrong Pokémon because of its Speed and Baton Pass. Agility can work well with Baton Pass, but this strategy is better utilized by Zapdos, who is statistically better suited for that type of set (the only advantage that Jolteon has over Zapdos is its higher Speed, which is negligible after an Agility boost anyway). Signal Beam has rather limited use, but it does OHKO Celebi when boosted by Choice Specs. Yawn can be used to force switches, allowing Jolteon to set up a Substitute to Baton Pass away. Fake Tears is another option for forcing switches, and it can work well with Spikes / Toxic Spikes support. Jolteon can use Rain Dance should you be using a Rain Dance team as it provides a useful Electric-type immunity. Jolteon can also take advantage of Thunder in rain as it gains 100% accuracy. Life Orb can be used on the Charge Beam set and the Choice Specs set if you want more power in the Charge Beam set or it allows you to switch moves for the Choice Specs set.</p>
[Counters]
<p>As with Espeon, there are not many things that technically "counter" the true goals of a fast SubPasser, but there are indeed Pokémon who can both switch in to Jolteon with little to no risk and pose an immediate threat to it.</p>
<p>At the top of this list would be Electivire and its Motor Drive, which can use Jolteon's Thunderbolt against it to outspeed the charged cat and threaten an Earthquake that will OHKO. Tyranitar will shrug off Thunderbolt thanks to the Special Defense boost granted to it via Sand Stream and will indirectly counter repeated attempts to pass Substitutes thanks to that same ability. Most Jolteon do not carry Shadow Ball or Signal Beam, so Celebi is often a good switch-in since it will never take more than 40% damage from Hidden Power Ice even with no EVs in Special Defense. Porygon2 can switch into Thunderbolt by Tracing Jolteon's Volt Absorb and can proceed to wear away at it with Ice Beam while Recovering off any damage dealt to it by Hidden Power. Gardevoir too can Trace to take the Thunderbolt, and relative Hidden Powers won't do loads. Choice Specs Shadow Balls are worrying, but otherwise, Gardevoir can Calm Mind up against it.</p>
<p>Jolteon counters itself, obviously—pretty much every Electric Pokémon can switch into Jolteon without too much of a threat. Pokémon like Cresselia, Blissey, Snorlax, and Regice can switch in rather effortlessly, but I cannot stress enough that there is technically no counter to a fast SubPasser, especially one that can easily OHKO common phazers such as Skarmory, Swampert, and Suicune. Ground-types can counter Jolteon depending on the Hidden Power choice. If Jolteon lacks Hidden Power Ice; Flygon and Gliscor can counter it, while if Jolteon lacks Hidden Power Grass; Mamoswine, Swampert, and Rhyperior can deal with it.</p>
